Module:HF

I have no idea what the hell this means but it apparently deals with image tabs in portable infoboxes. Somebody please help me make sense of it.

-- HF stands for High Frequency.
-- This Module augments the built-in HF
local HF = mw.InfoboxBuilderHF
 
----------------------------
-- Libraries of functions --
----------------------------
-- Parses invocation parameters, trims whitespace, and removes blanks
local getArgs = require('Dev:Arguments').getArgs

-- internal function, for use with other Lua modules 
-- eliminates the link portion wikitext of a File: call, leaving only the bare filename.
function HF._stripFileWrapper (s)
  if type(s) == 'string' then
    return (s
        :gsub("%[*(.*)", '%1') -- leading brackets
        :gsub("([%a]*)|+.*", '%1') -- arguments
        :gsub("([%a]*)%]*", '%1') -- closing brackets
        )
  else
    return false
  end
end

----------------------
-- Public functions --
----------------------
-- public function, for use in templates or articles
-- eliminates the link portion wikitext of a File: call, leaving only the bare filename.
function HF.stripFileWrapper(frame)
	local args = getArgs(frame)
	return HF._stripFileWrapper(args[1])
end

return HF